Wyjścia 21:24 Halacha: Mishneh Torah, One Who Injures a Person or Property

Damage, in what manner? If he chopped off the hand or the foot of his fellow, we look at [the fellow] as if he was a slave being sold in the marketplace: how much was he worth [then] and how much is he worth now. And he pays the depreciation of his value that he caused. As it is stated, "An eye for (tachat) an eye" - from the tradition, they learned that that which it states, "for (tachat)" means to pay money.

And from where [do we know] that that which it states with regards to limbs, "An eye for an eye," is [to be understood as] payments? Since it is stated about it, "A wound for a wound," and it is explicitly stated, "And when a man strikes his neighbor with a stone or with a fist, etc... he should surely give him his rest and his rehabilitation." Behold, you have learned that "for (tachat)" mentioned with regards to a wound means payments. And this is [also] the case with "for (tachat)" mentioned concerning the eye and concerning the other limbs.